[微積] Green's theorem
我想請教一個問題
在電動力學課本中,提到設定向量A=ψ▽Ψ
然後帶入divergence theorem,得到Green's theroem
我想問說為什麼可以在一開始就設定A=ψ▽Ψ???
不好意思很多符號和積分我不會打,所以才這麼簡短
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